<template>
  <div class="tabs">
    <el-tag
        v-for="(item,index) in tags"
        :key="item.path"
        :closable="item.name!=='home'"
        :effect="$route.name===item.name?'dark':'plain'"
        @click="changeMenu(item)"
        @close="handleClose(item,index)"
        size="small"
    >
      {{ item.label }}
    </el-tag>
  </div>
</template>

<script>
import {mapState,mapMutations} from 'vuex'
    export default {
        name: "CommonTag",
      data(){
          return{}
      },
      computed:{
          ...mapState({
            tags: state=>state.tab.tabsList
          })
      },
      methods:{
        ...mapMutations(['closeTag']),
        //  点击tag跳转的功能
        changeMenu(item){
          if(this.$route.path!==item.path && !(this.$route.path==='/home'&&(item.path==='/'))){
                    this.$router.push({name:item.name})
          }
        },
        //点击tag删除的功能
        handleClose(item,index){
          //调用store中的mutation
          this.closeTag(item)
          const length = this.tags.length;
          //跳转之后的逻辑
          if(item.name!==this.$route.name){
            return
          }
          //表示删除的是最后一项
          if(index===length){
            this.$router.push({
              name:this.tags[index-1].name
            })
          }else{
            this.$router.push({
              name:this.tags[index].name
            })
          }
        }
      }
    }
</script>

<style scoped lang='less'>
.tabs{
  padding: 20px;
  .el-tag{
    margin-right: 15px;
    cursor: pointer;
  }
}
</style>
